Take health care as a perfect example. Having studied the issue I personally think it’s impossible to have quality universal health care. Others disagree. But what we can both agree on is that only Government could do it if it is possible.
So the question isn’t inefficiency because both sides concede government is inefficient. But if government is the only power that can do it than inefficiency isn’t the issue. The conflict lies in what can be accomplished not in whether government could do it efficiently.
(People like me would argue the question is whether the private sector could provide better quality health care to more people but as long as the other side believes universal health care is possible the point is moot to them)